Audi says its sealed for life. But what "life" means for audi no one knows
Google . There are 1000s topics discussing this . Some say oil change works well, some had lost of issues after. Cost around £1k .
If you decide to do it make sure you use a garage who knows their stuff, using correct ATF oli as it can mess up your box
Mine did 119k , box runs like new. and i have resarched for last year . Still trying to decide...
i have attached a guide for reference
AudiTiptronic2013.pdf